MESON Chess Problem Database

Problem Display
PID: 238282 (1K1N3b/8/R2pN3/3kBQ2/2n5/3n4/2P4q/5B2 w - - 0 1)

Segers, Marcel

Chess World (The), 1933

1K1N3b/8/R2pN3/3kBQ2/2n5/3n4/2P4q/5B2

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Bg2#
    • 1...Qg2
      • 2.Bxg2#
    • 1...Qh6
      • 2.Bg2#
    • 1...Qh7
      • 2.Bg2#
    • 1...Bxe5
      • 2.Qf3#
    • 1...Sc5
      • 2.Sc7#
    • 1...dxe5
      • 2.Qxd3#
  • Tries
    • 1.Bxh2+?
      • 1...Be5
        • 2.Bg2#
        • 2.Qf3#
      • 1...Sde5
        • 2.Bg2#
      • 1...Sce5!
    • 1.Ra5+?
      • 1...Sc5
        • 2.Sc7#
      • 1...Sxa5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Sc7#
      • 1...Qxe5
        • 2.Bg2#
      • 1...Bxe5
        • 2.Qf3#
      • 1...Sdxe5
        • 2.Bxc4#
      • 1...Scxe5
        • 2.c4#
      • 1...dxe5
        • 2.Qxd3#
      • 1...Qh7
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD,P_SPINQ(a),XB(C)::B(A)
    • Q(a);N_GUARD::B(A),XQ(a)
    • Q(a);N_GUARD::B(A)
    • B(f);P_SPINB(f),SBLOCK,XB(C)::QAB(D)
    • S(b);SBLOCK::S(F)
    • P(e);P_SPINP(e),SBLOCK,XB(C)::QAR2(D),XS(b)
  • Tries
    • Try
      • B(C);CHECK,XQ(a)
      • Vars
        • S(b);P_SPINS(b)::B(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • R(E);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(F)
      • Refutation
        • S(c);XR(E)
  • Actual
    • R(E);
    • Threat
      • S(F)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XB(C)::B(A)
      • B(f);P_SPINB(f),SBLOCK,XB(C)::QAB(D)
      • S(b);OGATE,P_SPINS(b),XB(C)::B(A),XS(c)
      • S(c);OGATE,P_SPINS(c),XB(C)::P(B)
      • P(e);P_SPINP(e),SBLOCK,XB(C)::QAR2(D),XS(b)
      • Q(a);N_GUARD::B(A)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).